Torsion-rod means for holding grinding rollers in adjustable cooperation with opposing grinding elements



Nov. 6, 1951 TORSION-ROD M COOPE J. MORITZ EANS FOR HOLDING GRINDING ROLLERS RATION WITH OPPOS GRINDING ELE led July IN ADJUSTABLE MENTS Patented Nov. 6, 1951 T O R S N R O D MEANS FOR HOLDING GRINDING ROLLERS IN ADJUSTABLE COOPERATION WITH OPPOSING GRIND- ING ELEMENTS Jean Moritz, Chatou, France Application July 26, 1947, Serial No. 763,943 In France May 28, 1943 Section 1, Public Law 690, August 8, 1946 Patent expires May 28, 1963 4 Claims.

Hitherto, in roller crushers, the pressure of the rollers on the crusher plate has been obtained by means of helical springs, the rollers being actuated by a more or less complicated system of levers.

The purpose of the present invention is to apply the pressure of the roller or rollers to the crushing plate in this type of apparatus, by means of torsion bars.

The accompanying drawings diagrammatically illustrate the invention by way of example.

Figure 1 is a view in sectional elevation of the crusher;

Figure 2 is a view of the same in plan; and

Figures 3 and 4 show an alternative form of construction in sectional elevation and in plan respectively.

The torsion bar A is held solidly at its ends B and C by levers D, which are adjustable laterally, supported, for example, on tierods I, the ends of which are screw-threaded and are provided with a nut, which, according as it is screwed or unscrewed, acts on the corresponding lever, determining a greater or lesser torsion of the bar, and thus increases or diminishes the pressure on a roller E, mounted on a horizontal shaft rigid with two pivots or trunnions G and H. This system of adjustment of the levers, which is given merely by way of example, may be replaced by any other suitable arrangement. J is the crushing table.

This arrangement makes possible a considerable simplification in the construction of the apparatus, whilst producing complete protection of the internal members or elements and, owing to the simplicity of the arrangements, makes it possible to effect a very prompt replacement of the bar in case of accident.

Figures 1 and 2 show the torsion bar actuating at its centre portion the roller shaft, but a similar arrangement might easily be effected in which the torsion bar would actuate the shaft of the roller solely through one of its ends.

The whole of the arrangement is applicable not only to the case in which the crusher possesses only a single roller, as shown in the drawing, but also to crushers having several rollers.

As shown in Figures 3 and 4, the torsion bar arrangement may equally well be applied in the case where the shaft of the roller is vertical and the crusher plate is formed by a peripheral ring J1, on the inside of which the pressure of the roller is applied. The roller may possess a rotary movement, or on the other hand it may remain stationary, and then the crusher ring has a rotary movement. 1 v

The alternative form of construction in Figures 3 and 4 may be applied to crushers with one roller or to crushers with several rollers.

I claim:

1. A support for a roller grinder including the combination with a grinding element, of a roller shaft; at least one roller mounted on one end of the roller shaft and constantly cooperating with the grinding element; a torsion bar having one portion thereof disposed adjacent to the other end of said roller shaft at an angle thereto; a rigid connection between said portion of said torsion bar and said roller shaft for maintaining the latter in predetermined position; support means for said torsion bar forming bearing means therefor at one portion thereof independent of said rigid connection; at least one lever secured at one end to a portion of said torsion bar in such position that the supporting bearing means is disposed intermediate the lever and said rigid connection; and a rod having one end rigid with respect to said supporting bearing means and the other end adjustably connected to the other end of said lever.

2. A support for a roller grinder including the combination with a grinding element, of a roller shaft; at least one roller mounted on the roller shaft and constantly cooperating with the grinding element; a torsion bar having an intermediate portion disposed adjacent to the one end of said roller shaft remote from the roller thereon and at an angle to said roller shaft; a rigid connection between the intermediate portion of said torsion bar and said roller shaft for retaining the latter in predetermined position; supporting means for said torsion bar forming hearing means therefor intermediate said rigid connection and the ends of said torsion bar; a pair of levers individually secured at one end of each to the ends of said torsion bar; a pair of rods rigidly connected at one end of each respectively to the bearing supporting means; and adjustable connections at the other ends of said rods for adjustably connecting the latter to the other ends of said levers in order to adjust said roller with respect to said grinding element.

3. A support for a roller grinder including the combination with a grinding element, of a roller shaft; at least one roller mounted on the roller shaft and constantly cooperating with the grinding element; a torsion bar having an intermediate portion disposed adjacent to one end of the roller shaft transversely thereto for maintaining said roller shaft in predetermined condition; a rigid connection between said torsion bar and said one end of said roller shaft; support means; a pair of bearings fixed on said support means and supporting said torsion bar between said intermediate portion and both ends thereof; a pair of arms individually secured at one end of each to the ends of said torsion bar;

a pair of rods having one end of each rigid with said support means; and adjustable means mounted on the other ends of said rods for individually adjusting the other ends of said levers with respect to said rods.

4. A support for a roller grinder including the combination with a grinding element, of a roller shaft; at least one roller mounted on the roller shaft and constantly cooperating with the grinding element; an elongated torsion member disposed transversely to the roller shaft and rigidly connected at an intermediate portion thereof to the end of said roller shaft for maintaining the latter in predetermined position and condition; stationary support means; a pair of bearings upon said support means for supporting said torsion member intermediate the ends thereof; a pair of rods spaced apart and rigidly connected at one end of each to the support means, the other ends of said rods being disposed substantially at right angles to the torsion member;

a pair of arms mounted on the ends of said torsion member and extending substantially at right angles therefrom, the ends of the arms remote from said torsion member having transverse holes therein for receiving said other ends of said rods therethrough; and adjustable means on said other ends of said rods for adjusting the positions of said arms on the rods in order to adjust said roller with respect to said grinding element.

JEAN MORITZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 210,471 Senderling Dec. 3, 1878 303,125 Corcoran Aug. 5, 1884 451,392 Due Apr. 28, 1891 940,513 Clark Nov. 16, 1909 1,171,933 Emerick Feb. 15, 1916 1,523,881 Kreutzberg Jan. 20, 1925 1,733,417 Loesche Oct. 29, 1929 1,806,980 Kreutzberg May 26, 1931 1,875,794 Zettergren Sept. 6, 1932 2,144,185 Hamblin Jan. 17, 1939 

